Guangzhou Zhongli Technology Co., Ltd
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | 50-200 ton/month |
| Delivery Time | within 15days |
| Packaging Details | barrel |
| Corrosion Resistance | Excellent |
| Density | 3.2 g/cm3 |
| Hardness | 9 Mohs |
| Material | Silicon Nitride |
| Size | 1mm - 25.4mm |
| Surface Finish | Ra 0.1 - 0.2 μm |
| Precision Grade | G5 - G100 |
| Coefficient Of Thermal Expansion | 3.2 x 10^-6/°C |
| Maximum Operating Temperature | 1200°C |
| Chemical Resistance | Excellent |
| Surface | Polishing Finish |
| Type | silicon nitride bearings |
| Wear Resistance | Excellent |
| Usage | silicon nitride bearings |
| Electrical Insulation | Excellent |
| Brand Name | Zhongli |
| Model Number | SNB-01 |
| Certification | CE ISO |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T,Western Union | Supply Ability | 50-200 ton/month |
| Delivery Time | within 15days | Packaging Details | barrel |
| Corrosion Resistance | Excellent | Density | 3.2 g/cm3 |
| Hardness | 9 Mohs | Material | Silicon Nitride |
| Size | 1mm - 25.4mm | Surface Finish | Ra 0.1 - 0.2 μm |
| Precision Grade | G5 - G100 | Coefficient Of Thermal Expansion | 3.2 x 10^-6/°C |
| Maximum Operating Temperature | 1200°C | Chemical Resistance | Excellent |
| Surface | Polishing Finish | Type | silicon nitride bearings |
| Wear Resistance | Excellent | Usage | silicon nitride bearings |
| Electrical Insulation | Excellent | Brand Name | Zhongli |
| Model Number | SNB-01 | Certification | CE ISO |
| Place of Origin | China | ||
| High Light | Silicon Nitride Balls Milling Media ，Ceramic Silicon Nitride Balls ，8mm ceramic milling media | ||
Product Description
| Property | Silicon Nitride (Si3N4) | Steel (440C) | Zirconia (ZrO2) | Alumina (Al2O3) |
|---|---|---|---|---|
| Density (g/cm³) | 3.2 | 7.8 | 6.0 | 3.9 |
| Hardness (HV) | 1,400–1,600 | 700–900 | 1,200–1,300 | 1,500–1,800 |
| Fracture Toughness (MPa·m½) | 6–7 | 15–20 | 7–10 | 3–4 |
| Compressive Strength (GPa) | 2.5–3.5 | 2.0–2.5 | 2.0–2.3 | 2.0–3.0 |
●Description:
Silicon Nitride Ceramic Ball is the most ideal bearing ball for bearing applications, due to the excellent properties of silicon nitride ceramics, it has many irreplaceable advantages comparing to traditional steel materials, such as: high mechanical strength, low wear loss, good self-lubrication, low density, high corrosion resistance, good electrical insulation etc.
Therefore, Silicon Nitride Balls are mostly used for some harsh working conditions: high speed/super speed bearings, high precision bearings, bearings in vacuum, high/low temperature bearings.
Moreover, Silicon Nitride Ceramic Balls can also used as valve ball or measurement balls in chemical pumps/high temperature pumps/metdering pumps.
●Physical Properties:
| Chemical Composition: | Si3N4≥95% |
| Bulk Density: | 3.2±0.05g/cm3 |
| Elastic Modulus: | 350GPa |
| Hardness Vickers: | 1870HV |
| Bending Strength: | 780MPa |
| Fracture Toughness: | 7.2MPa·m1/2 |
| Thermal Expansion Coefficient: | 3.2 10-6/K |
| Thermal Conductivity: | 25W/(m·K) |
● Ball Sizes/Grade :
| Size (mm) | Φ0.8-180 | |||
| Grade | Vdws | SPH | Vdwl | Ra |
| G3 | 0.05-0.08 | ≤0.08 | <0.13 | 0.01 |
| G5 | 0.08-0.13 | ≤0.13 | <0.25 | 0.014 |
| G10 | 0.15-0.25 | ≤0.25 | <0.5 | 0.02 |
| G16 | 0.2-0.4 | ≤0.4 | <0.8 | <0.025 |
| G20 | 0.3-0.5 | ≤0.5 | <1 | <0.032 |
| G100 | 0.4-0.7 | 0.4-0.7 | <1.4 | <0.0105 |
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FAQ
While ceramics are generally brittle, Si3N4 has high fracture toughness (6-7 MPa·m½) compared to other ceramics like alumina. Properly manufactured balls resist cracking under mechanical stress.
Yes! They outperform steel in:
Speed: Lower mass reduces friction and heat buildup.
Lifespan: Up to 10x longer service life in harsh conditions.
Maintenance: Self-lubricating properties reduce grease dependency.
Standard (commercial-grade): For general industrial use.
High-purity (HIP’ed): Hot isostatically pressed for zero porosity (best for aerospace/medical).
SiAlON-modified: Enhanced thermal shock resistance.
Powder pressing – Si3N4 powder is compacted into spherical shapes.
Sintering – Fired at high temperatures (1,700–1,800°C) for density.
HIP (optional) – Hot isostatic pressing eliminates microvoids.
Precision grinding/lapping – Achieves sub-micron sphericity (Grade 5-100).
Diameter range: 0.5mm to 50mm (custom sizes possible).
Sphericity: As low as 0.1µm (Grade 5 for ultra-precision bearings).
Surface finish: Ra < 0.02µm (mirror polish for low friction).
Yes! Si3N4 is biocompatible (ISO 6474-1) and used in spinal implants, dental devices, and joint replacements due to its antibacterial properties.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2017
Employee Number:
80~110
Ecer Certification：
Verified Supplier
Guangzhou Zhongli Technology Co., Ltd. specializes in the development and production of high-performance metallic and non-metallic materials, as well as cutting-edge nanotechnology solutions for precision grinding and material processing. With a strong foundation in innovative grinding and mil... Guangzhou Zhongli Technology Co., Ltd. specializes in the development and production of high-performance metallic and non-metallic materials, as well as cutting-edge nanotechnology solutions for precision grinding and material processing. With a strong foundation in innovative grinding and mil...
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